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Copy the question, then write your answer choice and EXPLAIN WHY! 9-8-2010

. Copy the question, then write your answer choice and EXPLAIN WHY! 9-8-2010 The thermometers are measuring the temperature of the center of the soil samples. Which of the following is a cause of the measured difference in the temperature of the two soils?

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Copy the question, then write your answer choice and EXPLAIN WHY! 9-8-2010

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  1. . • Copy the question, then write your answer choice and EXPLAIN WHY! • 9-8-2010 • The thermometers are measuring the temperature of the center of the soil samples. Which of the following is a cause of the measured difference in the temperature of the two soils? •   A. conduction within different soil types   • B. condensation within different soil types   • C. radiation emitted by different soil types   • D. convection in the air above different soil types The diagram represents an experiment on different types of soil

  2. 9-13-10 • Sherry is going to use her computer to draw a three-dimensional box. She wants to be able to specify the exact dimensions and angles and to rotate the box as needed on the screen.Which of the following types of programs would Sherry most likely use for this purpose? • A. word processing software   • B. math spreadsheet program   • C. Internet-based search engine   • D. computer-aided design program

  3. 9-14-10 During an investigation, Steven filled two cups with the same amount of water and placed them in a 20°C room for 30 minutes. Cup 1 was filled with 5°C water. Cup 2 was filled with 35°C water. The diagram below shows the temperatures of the cups at the beginning of the investigation. Which of the following graphs shows how the temperatures of the two cups of water most likely changed over 30 minutes? B A D C

  4. 9-15-10 • Which of the following tools is mostuseful for tightening a small mechanicalfastener? • A. chisel   B. pliers   C. saw   D. sander

  5. 9-16-10 • Ms. Bristol measured the mass of a closedbeaker containing several ice cubes. Themass was 100 g. An hour later, after theice cubes had melted, Ms. Bristolmeasured the mass of the beaker again. • What was the mass of the beaker of waterthe second time? •   A. 50 g   B. 75 g   C. 100 g   D. 125 g

  6. 9-17-10 Jorge was given the cube shown and asked to determine the density of the cube. The material that the cube is made from is unknown. a.  Identify the two properties of the cube that must be known in order for Jorge to determine  the density of the cube. b.  Describe how Jorge could measure each of the properties of the cube you identified in part (a). Be sure to identify any tools Jorge would use and describe how he would use them. c.  Explain how the measurements you described in part (b) can be used to determine the     density of the cube.

  7. 9-20-2010 • Which of the following would be most effective in reducing air traffic congestion at a busy airport? •  A.providing performance feedback to pilots  • B.providing flight information to passengers  • C.increasing the number of aircraft at the airport D.increasing the number of runways at the airport

  8. 9-21-2010 The diagrams below illustrate two blockscomposed of different materials. If Block A is located on the Moon andBlock B is located on Earth, what propertydo these two blocks have in common? • A.They have the same mass. • B.They have the same weight.  • C.They have the same volume. • D.They have the same surface area. A B

  9. 9-22-2010 For a technology project, Kyle came up with an idea to build a model bridge. He wants his bridge to span 50 cm and to support a 1 kg object. • According to the engineering design process, which of the following should be Kyle’s next step? •  A.construct prototypes of different kinds of bridges • B.research the different designs of bridges  • C.gather the materials needed to build the bridge  • D.make a drawing to show how to build the bridge

  10. 9-23-2010 • New carpet is being measured for a roomthat is 5.5 m by 4.6 m. On a measuringtape, what is the smallest unit that isnecessary to measure the room accuratelyfor the carpet? •  A.millimeters • B.centimeters  • C.meters  • D.kilometers

  11. 9-24-2010 • The picture below shows a company’s design for a nightlight. The nightlight is designed to plug into an electrical outlet. The nightlight is also designed to turn on automatically when it is dark and to turn off when it is light. • a.  Name two different materials that could be used in the nightlight. Identify a part of the nightlight that each material could be used to make. • b.  For each material that you named in part (a), describe one property of that material that makes it appropriate to be used to make the part you identified.

  12. 9-27-2010 • Tobias rode his bike on a road for a 2 hrperiod. On average, he passed a 1 kmmarker every 3 min during this period. • Which of the following was his averagespeed for this 2 hr period? •  A.10 km/hr •  B.15 km/hr  • C. 20 km/hr  • D.25 km/hr

  13. 9-28-2010 • Laura adds 50 mL of boiling water to100 mL of ice water. If the 150 mL ofwater is then put into a freezer, at whattemperature will the water freeze? •  A.0°C  • B.15°C  • C.37°C  • D.50°C

  14. 9-29-2010 • manufacturer wants to produce acontainer for food storage that does notbreak easily and is airtight, inexpensive,and microwave-safe. Which of thefollowing is the best material to use tomake the container? •  A.glass  • B.metal  • C.paper  • D.plastic

  15. 9-30-2010 • Which of the following bridges is anexample of a suspension bridge? A B C D

  16. 10-1-2010 • The diagram below shows a Formula 1 racing car. Many forces act together on the racing car so it can move safely at high speeds on a racetrack. • a.Copy the simple diagram of a racing car shown below into your Student Answer Booklet. • b.Using your copy of the diagram, draw arrows to show how the forces of thrust, drag, and gravity act on the racing car as it moves forward on a racetrack. Label each arrow as thrust, drag, or gravity. • c.Describe how each force that you labeled in part (b) acts on the racing car as it moves on a racetrack.

  17. 10-4-2010 • Which of the following statements best explains why it is warmer at the equator than at the North Pole? •  A.The equator has a larger area than the North Pole.  • B.The equator is closer to the Sun than the North Pole.  • C.The equator receives more direct sunlight than the North Pole.  • D.The equator has more hours of daylight per year than the North Pole.

  18. 10-5-2010 • Which of the following causes a ship’siron anchor to sink to the ocean floorwhen it is released overboard? •  A.chemical forces  • B.gravity  • C.magnetism  • D.nuclear forces

  19. 10-6-2010 • Which of the following is the bestestimate of the number of starsin a typical galaxy? •  A.tens  • B.hundreds  • C.thousands • D.billions

  20. 10-7-2010 • After a windstorm, Niko called theelectric company to report that hehad no electricity. His phone call isan example of which of the followingelements of a universal systems model? •  A.designing a process  • B.generating output  • C.giving feedback  • D.setting a goal

  21. 10-8-2010OPEN ENDED • The planets in our solar system were formed mainly by one force. That same force affects the motion of the planets in our solar system. • Identify the force that is responsible for the formation of the planets in our solar system. • Describe how the force you identified in part (a) formed the planets in our solar system. • Describe two other examples of the effects this force has in our solar system.

  22. 10-11-2010 • What is the primary energy sourcethat drives all weather events, includingprecipitation, hurricanes, and tornados? •  A.the Sun  • B.the Moon  • C.Earth’s gravity  • D.Earth’s rotation

  23. 10-12-2010 • Which of the following keeps theplanets in our solar system in orbitaround the Sun? •  A.atmospheric pressure  • B.gravitational force  • C.electromagnetic energy •  D.thermal energy

  24. 10-13-2010 • Which of the following lists is in orderfrom smallest to largest? •  A. Universe Solar System Galaxy •  B. Galaxy Solar System Universe •  C. Solar System Universe Galaxy •  D. Solar System Galaxy Universe

  25. 10-14-2010 • Which of the following diagrams best represents the relationship between galaxies, the universe, and solar systems? •  A.  C. B D

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